Today marks the 155th anniversary of the birth of Theodore Roosevelt (1858-1919), who was the 26th President of the United States (1901-1909). Here at the Museum, the Theodore Roosevelt Memorial celebrates his unmatched conservation legacy.

Watch live on Monday, October 28, at 9 am EST as Neil deGrasse Tyson hosts a discussion with the team behind Dark Universe,the new Space Show opening in just one week at the Hayden Planetarium on Saturday, November 2.

Current conservation efforts strive to prevent our world’s endangered species from going extinct. But with new biotechnologies emerging, will it ever be possible to bring back extinct species from previous centuries?

A curious confluence of history, industry, and art can be seen in the skull of a rough-toothed dolphin, Steno bredanensis, featured in the special exhibition Whales: Giants of the Deep,open only through Sunday, January 5, 2014.